Laser Refractography

Front Cover
Springer Science & Business Media, Dec 14, 2010 - Technology & Engineering - 189 pages
This monograph is devoted to the description of the physical fundamentals of laser refractography—a novel informational-measuring technique for the diagnostics of optically inhomogeneous media and flows, based on the idea of using spatially structured probe laser radiation in combination with its digital recording and c- puter techniques for the differential processing of refraction patterns. Considered are the physical fundamentals of this technique, actual optical schemes, methods of processing refraction patterns, and possible applications. This informational technique can be employed in such areas of science and technology as require remote nonperturbative monitoring of optical, thermophysical, chemical, aerohydrodynamic, and manufacturing processes. The monograph can also be recommended for students and postgraduates of - formational, laser, electro-optical, thermophysical, chemical, and other specialties. Laser refractography is a conceptually novel refraction method for the diagn- tics of inhomogeneous media, based on the idea of using spatially structured probe laser radiation in combination with its digital recording and computer techniques for the differential processing of refraction patterns.
 

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Contents

Introduction
1
12 Classical Schlieren Methods
4
13 BackgroundOriented Schlieren Method
8
14 LaserComputer Scanning and Multichannel Methods
10
15 Speckle Refractometry
13
16 Laser Refractography
14
References
18
Structured Laser Radiation SLR
21
53 Refractograms of Linear MultiplePoint SLR
95
References
100
Laser Refractographic Systems
101
62 Refractographic Systems with Various Types of SLR
105
63 Refractographic System for Studying Free Convection in Liquids
109
64 Experimental 2 and 3D Refractograms in Boundary Layer Investigations
114
65 Refractographic System for Visualization of Liquid Mixing in Twisted Flows
119
66 TwoPerspective Laser Refractographic Systems for Monitoring Nonstationary Thermophysical Processes
124

22 Gaussian Beams
22
23 Formation of SLR on the Basis of Optical Elements
29
24 Formation of SLR on the Basis of Diffraction Gratings
36
25 Formation of SLR on the Basis of Diffraction Elements
38
References
40
Physical Processes Giving Rise to Optical Inhomogeneities in Media
41
32 Acoustic Field in Liquids and Gases
47
33 Liquid Mixing Processes
50
34 Hydrodynamic Phenomena in Stratified Liquids
56
References
58
Refraction of Laser Beams in Layered Inhomogeneous Media
59
42 Quasioptical Approximation for Laser Beams in Weakly Inhomogeneous Media
67
43 Numerical Modeling of the Propagation of a Beam in a Weak Exponential Temperature Inhomogeneity
73
References
77
Refraction of Structured Laser Radiation in Spherical Temperature Inhomogeneities
79
52 Refractograms Based on Cylindrical SLR
93
67 Experimental Refractogram Library
131
References
133
Digital Refractogram Recording and Processing
135
72 Digital Laser Refractogram Recording Systems
136
73 Digital Laser Refractogram Models
151
74 Digital Refractogram Processing Methods
156
75 Digital Refractogram Recording and Processing Recommendations
165
References
166
Laser Refractographya Method for Quantitative Visualization of Optically Inhomogeneous Media
169
82 Plane SLR RefractogramBased Algorithm for Reconstructing the Temperature Field in a Spherical Boundary Layer
170
83 Results of the Reconstruction of the Temperature Profile of the Spherical Boundary Layer
174
84 Determination of the Parameters of an Exponential Model of a Boundary Layer at the Surface of a Heated Ball
178
85 Refractogram Library Construction Principles
181
References
186
Index
187
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About the author (2010)

Bronyus Simovich Rinkevichyus graduated from Moscow Power Engineering Institute with a degree in applied physical optics in 1965, defended his candidate's thesis in electronics at Moscow Power Engineering Institute in 1969, defended his doctoral thesis in optics at P.I. Lebedev Physical Institute of the Russian Academy of Sciences in 1980, Full Professor at V.A. Fabrikant Chair of Physics of Moscow Power Engineering Institute (Technical University), Doctor of Physics and Mathematics Science, author and co-author of over 300 scientific papers, 3 monographs, and 5 books published in the Russian and English languages, Member (affiliate) of IEEE,Full Member of D.S. Rozhdestvensky Optical Society, Full Member of the International Academy of Sciences of Higher School. The main fields of his scientific interests are coherent and informational optics, physical fundamentals of the laser diagnostics of flows, and history of science. Olga Anatolyevna Evtikhieva graduated from Moscow Power Engineering Institute with a degree in optoelectronic instruments in 1975, defended her candidate's thesis at Moscow Power Engineering Institute in 1980, Head of V.A. Fabrikant Chair of Physics of Moscow Power Engineering Institute (Technical University), Candidate of Technical Sciences, author and co-author of over 80 scientific papers and 4 books. The main fields of her scientific interest are applied and informational optics and laser refractometry. Irina Lvovna Raskovskaya graduated from Moscow Power Engineering Institute with a degree in radio physics in 1981, graduated from Moscow State University with a degree in theoretical physics in 1990, defended her candidate's thesis at Moscow State Technical University Stankin in 2005, Senior Researcher at V.A. Fabrikant Chair of Physics of Moscow Power Engineering Institute (Technical University), Candidate of Physics and Mathematics science, author and co-author of over 50 scientific papers. The main fields of her scientific interests are propagation of radio and optical waves in inhomogeneous media and laser measuring systems.